Specification Brand : Taps - Special Pitch BulletPoint1 : Thread Diameter: 9/16" BulletPoint2 : Threads Per Inch: 40 BulletPoint3 : High Speed Steel. Ground Thread. BulletPoint4 : Plug style special pitch tap - the most popular style hand tap, with a chamfer in between Taper Taps and Bottoming Taps. ItemName : 9/16-40 Special Pitch Plug Tap, High Speed Steel ItemPackageQuantity : 1 ItemTypeKeyword : hand-threading-taps Manufacturer : Taps - Special Pitch Material : high speed steel NumberOfItems : 1 PartNumber : TAST-9/16-40 ProductDescription : High Speed Steel Ground Thread Plug Taps for special pitches. ProductSiteLaunchDate : 2005-02-13T00:00:00.000Z